On Tue, 29 Jan 2008 13:20:29 +0100, Terje J. Hanssen <[EMAIL PROTECTED]>
wrote:
Mon, 28 Jan 2008 07:02:00 -0800 Herman Robak wrote:
I think it is me who is "dumb", because I may have misunderstood
the B/W values' intent. Jugding by their behaviour, they look like
convenience inputs that you can use to change the current width and
height by a certain factor.
Note: I _think_ that I was _dumb_. I don't really have a clue,
and my guess is as good as yours.
Usecase: The current resolution is 640x480, and for some reason
you want it to be 1.33 times wider. You don't have to calculate
what 640x1.33 is; you type 1.33 into the "W" input instead, and
Cinelerra calculates it for you.
Do you consider this "helper" feature useful and necessary?
Here I am asking all of you readers if this feature should be
removed, since users either get confused by it or just ignore it.
I would much rather have a pixel aspect ratio setting than a
convenience feature to recalculate image dimensions. I can use
a calculator if I need that, since it's not that often.
Herman,
I'm still confused and not sure about the intention and working set of
the B/W values.
I can't blame you :-(
And nn case some of our comments have been crossposted, I'll sum up the
essentials from my two last posts on this subject part:
-> selecting Set Format>Presets to 1080i results in the following video
attributes:
Frame rate: 29.9700
Width: 1920
Height: 1080
W Ratio: 2.6667
H Ratio: 1.8750
As full HD video 1920x1080 resolution already is set here, the W and H
values as I understand it cannot be any multiply (x) for these
resolutions values (?)
Playing with number ratios, also have at this calculations:
Width of 1080_HD_video/DV=1920/720 =2.6667=W_Ratio_for_1080_HD_video
Height of 1080_HD_video/DV=1080/576=1.8750=H_Ratio_for_1080_HD_video
Mere chanches or some reasonable explanation for these coincidences?
The best way to answer that is to examine the source code which performs
those calculations. Otherwise, I suggest you ignore the B and W values.
I've always done, and other people I just asked have ignored them, too.
--
Herman Robak
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